Freecharge Offer Book On RedBus !! Get FreeCharge coupons worth Rs.100 on booking from redBus. Offer valid on redBus Mobile App (iOS, Android and Windows), Mobile Web and Website. FreeCharge offer codes will be sent through email after the date of journey. Cashback offer valid on FreeCharge Mobile App (iOS, Android and Windows), Mobile Web and Website. Get Rs.50 cashback on minimum transaction of Rs.20. One code is valid for one transaction only. Only 2 codes can be used per user/email id/mobile number. Offer not valid on Airtel (Prepaid/Postpaid/ DTH ) transactions. Offer not valid on add cash transaction. Promotional cash back is valid for 6 months only and cannot not be refunded to bank. Promotional cashback will be credited in form of vouchers to the wallet. Cashback will be credited to FreeCharge Wallet within 24 hours.